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These are the sponges with calcareous (rather than siliceous) skeletons. Their spicules are made up of calcium carbonate; they are simple in structure or may have up to four rays. Members of the Class Calcarea are small. All species are marine.
2009/11/29 02:15:28.819 US/Eastern
To cite this page: 2001. "Clathrinida" (On-line), Animal Diversity Web. Accessed December 01, 2009 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Clathrinida.html.
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